EDIT: New clips of Korra vs. the gangsters, training etc. :)Over on io9

Observations, looks like Katara'll be appearing more than just in that brief bit at the beginning when she gives Korra her blessing to go and start her airbending lessons. And it seems we can add radios to the technology that they have in the show in addition to the airships, cars and motorbikes that have already been shown.